Why Do They Test Bathroom Floors With MARBLES?! 🤯 #shorts

210.3K views · 2.9K likes · Oct 22, 2026

Why are these workers dumping marbles all over a bathroom floor? It looks like a strange game, but it’s actually a clever way to test the floor’s slope. In Japan, some tile installers use this method to check whether the floor directs water toward the drain. They release the marb…